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Week 1

Color Theory and File Issues Explored
Nearest Color Palette Exercise
Color Reduction on Images

Place the mouse pointer on all images
to the end of Web Page, please.

Original Image wih 16 Millions Colors

Image wih a Reduction to 256 Colors

Image with a Color Reduction to 16 Colors

The 16-color image looks unacceptable, original
dark colors and shadows are not sharp
and the structure inside the apple
is rather pale and of poor quality overall.

File Formats

Image with 256 colors (8 bits)


Image with 256 colors (8 bits)

Image with 16 colors (4 bits)

Image with 2 colors (1 bit)
Notice the difference as you look from top down,
the 2-color image looks awful.

Transparent .gif File

Transparent Image

Transparent image

Pixels are transparent

.JPG File Format

Original Costume

Costume 10

Costume 40

Costume 60

Costume 80

Costume 99

JPG Pitfalls

Image saved as a .GIF

Image saved as a .JPG with 40 % compression

The Image with the gif extension looks
sharp and retained all the original colors
while the jpg extension image lost the sharpness.

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End of Lesson 1